Seth MacFarlane and Alexis Knapp: Are They a New Couple?

Family Guy creator Seth MacFarlane looks like he has a new lady in his life, and it's not cartoon wife Lois Griffin.

MacFarlane, 39, has been dating Pitch Perfect actress Alexis Knapp, E! News reports. Knapp's voice – coincidentally – could be heard on the "Valentine's Day in Quahog" episode of MacFarlane's hit FOX show this past season.

"They've known each other and have been friends for years," a source tells PEOPLE. "She's very bright and loves science like him. She's down-to-earth and sweet."

Before her breakout role in last year's Pitch Perfect (as Stacie, a highly sexual member of the all-female a cappella group the Bellas), Knapp, 24, was featured in Couple's Retreat, Percy Jackson & the Olympians: Lightning Thief and Project X. She will appear in the pilot of Rebel Wilson's new ABC sitcom, Super Fun Night", this fall.